Shimano GRX FC-RX820 2 x 12-Speed Crankset Size:172.5mm 48-31T 1305g (ENVE Alloy Hubs)

1305g (ENVE Alloy Hubs)

Spokes: Sapim E-Lite [R] Race [F]

and many other options usually reserved for much more expensive mountain bike helmets

Optimal balance of stiffness

M 30 - 33"

Shimano GRX FC-RX820 2 x 12-Speed Crankset Size:172.5mm 48-31T 1305g (ENVE Alloy Hubs)The SHIMANO FC RX820 2 balances weight savings and optimal efficiency for mixed terrain riding and racing. Double chainring gearing caters to the segmented demands of gravel cycling, maintaining the tighter gear steps needed to maintain your position in the bunch. FeaturesGravel optimized 48 31t gear combination ratios preserve riding rhythm on rough surfaces The 17t range covers an array of riding conditions Smaller gear steps for cadence control on